Carpenter&#39;s computing-scale.



CARPENTERS COMPUTING SCALE.

APPLICATION FILED FEB. I6. I9I4.

. STATESPATENT onnijcn V4rianniiiiiox 'a'. Hennie, or mationen, wisconsm.

CABPENTEBS COMPUTING-SCALE. l

To all whom t may comer/n:

Be it known that I, FREDERICK R. Hennie, a citizen of the United States, residing at Milwaukee, county of Milwaukee, and State of Wisconsin, have invented new and useful Improvements in Carpenters Computing- Scales, of which the following is 'a speciication.

My invention relates to improvements carpenters computing scales.

The object of my invention is to provide a ruler which, when applied to an architects floor plan drawings, will indicate not only dimensions, but will also show the number of joists or studs required, said ruler being further adapted for taking ordinary inea-s-1 ureineiits.

ln the drawings- Figure l is a plan view of a ruler embodyingwmy invention..

i ig. 2 is an end view of the sainen Lilie paris are identied by the sanie reference characters in both views As will be observed from a comparison of Figs. l and 2, the shape of iny improved ruler is substantially the same as an oidinary ruler having its upper surface beveled iii .OPLOOSite directions, as shown A and B, from a central flat surfaced perl C. The beveled portion A is divided on? by lines D, E and F into inches, thirds oi an iiich and siXths-oi" an inch. lt is also vided longitudinally by lines G, ll and into a series oflon itudinal belts. The belt between the line and the adjacent side margin oi the ruler is occupied solely by the scale marks. The marks D and E representing inches and thirds ofv an inc entend across the second belt or zone betweentlie lines G and .ll-l, and this belt is provided with a series of figures representing the number of joists sixteen inches inroin center to center required for any given dimension indicated by the ruler when applied to an arohitects door plans, if such iioor plan is drawnv to a scale of one-eighth of an inch to the foot. ln this belt it will be sullicient to employ figures only in the spaces directly back of the 'terminals of the index lines F. Figures may therefore be omitted from the lines D and E, since one or the other oi these lines will alternate between each successivev two lines F and the number pertaining to each line D or E maythereore be ascertained from the adjacent numbers used in connection with the lines F as readily as ir" l lSpeeiievzation of Letters Patent.

preferably applied 'to the lines this projecting margin is provided opposi the numbers were actually applied directly to the linesD and E in this belt. lt is not material to my invention, however, whether the numbers be applied to all of the lines or not, if applied at regular intervals and to a sufficient number of the lines so that the number ci joists represented by the re lines or indes marks can be instantly ascertaineda The belt between the lines lol and l is also provided with indes,7 numbers indicating the number ci joists required by the plan in case the drawnig is on a scale oi one-*quarter of an inch 'to the foot. bers are applied only to since-the lines only fractions.

'llie central belt C ci the ruler may be provided with-index marks for the inch only, these inarlrs representing an ordinary ruler indexa The beveled portion B ol2 the ruler provided with transverse index lin s and M, whicn subdivide this margin the ruler substantiay in the ordinary inanner into inches, quarter inches and eiglitli inchesn But this margin oi" the ruler is also divided by lines nl, @l and l) longitudinally extending belts, the iirst oie whicli is occupied only by the index lines, wwe the second between the l) and lll is brovided with numbers indicating tlie dinnans'ions in feet represented by the drawing n the lines D and lll, F will in such case indicate the drawing is on the scale of one-eiglitli of il u Pis pro vided with index numerals and these are la and K, these being the lines to which no index numerals are applied in the other belt. The central belt C may also be provided with numerals designating the lines K which subdivide tlie ruler into inches.

'lhe scale for the beveled portion B of the ruler preferably runs in the opposite direction from that on the beveled portion il. At the end of the ruler an unruledinarginR is provided which designates the scale which caen belt represents. For example,

l y Patenten laan a', ieia. ,j Appllcatienled February le, 131e. Serial No. Sle'l.

'lliese index nuniies the intermediate belt with the Words Scale to ft. The inner belt is provided with the words Scale i" to ft.

In the use of my improved ruler, the carpenter desiring to bid upon plans as drawn by an architect, applies the ruler to the drawings using the beveled margin A to ascertain the number of joists required for the building, or any given part thereof. If the plans are drawn on a scale of inch to the foot, the carpenter will inspect the figures of the intermediate belt only, whereas if the scale is i inch to the foot he will inspect the figures Vof the inner belt only.

To ascertain the length of any timbers indicated on the architects plans, or of any other portion of the building, he Will re-4 verse the ruler and apply the beveled margin B, whereupon if the scale is J8- inch to the foot, he will examine the intermediate belt 'to ascertain the number of feet represented by any given line on the drawing, using the :iEnner belt in case the scale is inch to the oot. v It will be Yunderstood that the portion A. of my improved ruler is laid out with reference to the common practice of spacing the joists of all ordinary buildings on sixteen inch centers, that is to say, the distancel from the center of one joist to the nter'of the next as measured on transverse lines will be sixteen inches.

I claim- A. carpenters computing rule subdivided I.

along one margininto inches and fractions of an inch and having longitudinal zones `the number of spaced structural members required for construction-work covering any given distance indicated on the plan, substantially as described.

In testimony whereof I ax my signature A in the presence of two witnesses.

FREDERICK R. HORNIG. Witnesses:

Lnvnnn'ir C. WHEELER, IRMA D. Bimimn. 

